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Choice design variablesThe design variables we have considered for optimization define dimensions or angles or in more general terms the magnitude of a variable or the number of items.For laminate design, we will also run into choice design variables that will define which of several options we will choose.For Example 4.1.1, we had to choose between three laminates and this is formulated with choice design variables in Example 4.1.2.Later, the main use would be to choose ply angles from a limited set of 0, 90, 45 or -45.

Example from geometry

Optimization formulation Areas and perimetersArea with choice variables

Optimization formulation

Solver initial screen

Solver solution

Answer report

Example 4.1.1 revisited

Strain constraints and moduli

Use of choice variables in 4.1.2